塔里木盆地气－液溶解平衡机制下的原油轻烃行为及其地质意义

塔北地区普遍存在气顶型凝析气藏和带油环的凝析气藏。与传统烃类热演化理论相矛盾的是：１）天然气的成熟度远高于油环原油或凝析油；２）高－过成熟天然气与同藏的原油间存在明显的物性不匹配。结合地质背景，认为这种矛盾是由后期形成的干气进入已形成的油藏并溶解原油轻烃这一过程所致，凝析气中的轻烃是气－液溶解平衡的产物。地质历史时期凝析气与油环分离或产生凝析油气藏或混入其它油藏的蒸发分馏作用过程导致了轻烃的油藏再分配，形成了塔北地区纵向上原油轻烃的“反序”分布趋势及某些参数的异常分布。认为烃类的气－液相溶解平衡作用是原始原油轻烃分布特征后期演变的主要控制机制之一。其实质是不同性质轻烃气液两相差异性分配基础上的物理化学分异过程。     

浙西康山可燃有机岩矿脉的实质与成因

对浙江西部康山可燃有机岩矿脉的镜下观察与煤，石油沥青的热模拟产物的对比，稳定碳同位素，生物标志物，微量元素的分析对比，以及大量陆源碎屑物和自生矿的的存在，确定这种可燃有机岩矿脉的实质是腐泥质盆煤－无烟煤，而非石油衍生物，不属于经过运移的石油沥青；综合区域地质条件，矿脉产状和分析数据对比，再次确认其来源为下寒武统荷塘组腐泥煤。     

Distribution and sources of aliphatic and polycyclic aromatic hydrocarbons in suspended particulate matter in water from two Brazilian estuarine systems

The levels of selected organic markers, including 17 polycyclic aromatic hydrocarbons (PAHs), 16 of which are classified as priority pollutants by the US-EPA and perylene, aliphatic hydrocarbons (total and linear alkanes) and petroleum biomarkers (hopanes and steranes), were measured in suspended particulate matter (SPM) of the Mundaú-Manguaba estuarine-lagoon system (MMELS) in northeastern Brazil and the Paraíba do Sul River (PSR) estuary in southeastern Brazil, both of which are affected by sugarcane agriculture and urbanization. A total of 33 surface water samples of SPM were collected (22 from the MMELS and 11 from the PSR). The ∑16PAH ranged from 221 to 1243 ng g⁻¹ in the MMELS and from 228 to 1814 ng g⁻¹ in the PSR. Hopane and sterane concentrations in the PSR were higher than in the MMELS due to the input from petrogenic sources in PSR. The contributions of higher plants were also observed by n-alkane analyses. The PAH isomeric ratios indicated that the SPM from MMELS showed characteristics of combustion from biomass or petroleum and PSR was associated to petrogenic input, either from combustion or from unburned petroleum. Three sampling sites located near to the sugarcane plant and mouth of the rivers showed higher PAH concentrations and may largely be considered as highly contaminated. However, levels of n-alkanes and petroleum biomarkers in both study areas were relatively low.     

叠合盆地断裂上、下盘油气差异聚集效应及成因机理

断裂沟通叠合盆地不同层位、不同时代的烃源岩和生储盖组合,成为连接烃源岩和各种圈闭的重要渠道,导致形成了多种类型与断裂有关的油气藏。断裂上、下盘油气聚集差异现象十分普遍。通过剖析松辽盆地、柴达木盆地典型断裂带油气藏成藏条件,认为其根本原因是由于断裂上、下盘具有不同的地质特征和油气运聚成藏条件,它们往往具有互为消长的关系。油气富集在断裂的上盘还是聚集在断裂的下盘,主要取决于:断裂的作用,断距与储、盖层的厚度关系,断裂倾角,区域盖层之下断裂断开烃源岩或油气层的层数,断裂形成或活动时期与主力烃源岩排烃高峰时期的关系等 8个主要因素。